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Preparation and application of functional polymers—II. Preparation of vinyl ethers and thioethers using polymer-supported phosphonium salts

✍ Scribed by Ahmed Akelah

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
242 KB
Volume
18
Category
Article
ISSN
0014-3057

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✦ Synopsis

Insoluble polystyryldiphenyl-methoxymethyl-and methylthiomethyl-phosphonium chlorides have been prepared by treating polystyryldiphenylphosphine with chloromethylmethyl-ether and thioether respectively. These reagents were used for the conversion under mild conditions of carbonyl compounds into vinyl-ethers and thioethers, otherwise difficult to obtain; yields are high and work-up is easy. Moreover, methyl and ethyl fl-styryl ethers were also prepared from the polymeric phosphorane by treatment with formate esters.

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Spacer-modified polymer supports have been synthesized through the polymeric Grignard reagent method. Phosphonium-active sites were then introduced into these supports and the polymer-supported phosphonium salts were used as phase transfer catalysts for the nucleophilic substitution reactions. lnflu